Surname Fasavang (Fasavang 
) , in all the world, is a very rare cognomen. The family name Fasavang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Fasavang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fasavang | Laos, United States, Thailand |